Deadspin reported in September that Vitor Belfort had a sketchy drug test result weeks before a fight with Jon Jones at UFC 152 in September 2012. Belfort appeared to have elevated levels of testosterone. The numbers, though, were never reported and the main event fight went on as scheduled.
Jones didn't know about the test until the Deadspin report came out. He's not surprised about Belfort, a rumored performance-enhancing drug user for years. However, Jones told Ariel Helwani in a sweeping interview last week for MMA Fighting that he is upset the UFC knew before the bout and didn't do anything about it.